How to evaluate the cutting quality of laser cutting machine

1. Verticality. If thickness of the sheet metal exceeds 10 mm, the perpendicularity of the cutting edge is very important. When far from the focus, the laser beam becomes divergent, the cutting becomes wider toward the top or bottom. The more vertical the edge, the higher the cutting quality.

2. Glitch. The formation of the burr determines a very important factor in the quality of the laser cutting, because the removal of the burr requires an extra workload, so the severity and the amount of the burr can directly determine the quality of the cutting.

3. Depression and corrosion. The depressions and corrosion have an adverse effect on the surface of the cutting edge, affecting the appearance. They appear in cutting errors that should normally be avoided.

4. Cutting width. The width of the slit generally does not affect the cutting quality. The cutting width has an important effect only when a particularly precise contour is formed inside the part,because the width of the cutting determines the minimum meridian of the profile. As the thickness of the sheet increases, the cutting width also increase. to ensure the same high precision, regardless of the width of the slit, the workpiece should be constant in the processing area of ​​the laser cutting machine.

5. Roughness. The fiber laser cutting will form a vertical grain. The depth of the grain determines the roughness of the cutting surface. The shallower the grain, the smoother the cutting quality. Roughness not only affects the appearance of the edges, but also affects the friction characteristics. so it is necessary to reduce the roughness.

6. Grain. When the slab is cut at high speed, the molten metal does not appear in the slit below the vertical laser beam, but instead is ejected after the laser beam is deflected. As a result, the curved lines are formed at the cutting edge, and the lines closely follow the moving laser beam. To correct this problem, the feed rate is lowered at the end of the cutting process, and the texture of the lines can be greatly eliminated.

7. Deformation. If the cutting causes the part to heat up sharply, it will deform. It is especially important to fine machining because the contours and tabs here are usually only a few tenths of a millimeter wide. Controlling laser power and using short laser pulses can reduce component heating and avoid distortion.

8. Heat affected zone. The area near the slit is heated and the structure of the metal changes. such as, some metals harden. The heat affected zone refers to the depth of the area where the internal structure changes.

9. Material deposition. The laser cutter hits a special oil-containing liquid on the surface of the workpiece before it begins to melt the perforations. During the cutting process, the customer blows off the cut with the wind due to gasification and various materials are not used, but the upward or downward discharge also forms a deposit on the surface.